Hi all, I'm having a very similar problem. I created a shortcut for Flip 3d and placed it on the desktop.
(To save confusion, the reason I had created a shortcut for Flip 3d is because I have a mouse that allows me to program macros. Programming the standard Flip 3d shortcut of 'Windows key + Tab' into the macro proved to be useless as the stack of documents would just continuously scroll).
Next, I set a keyboard shortcut of 'Ctrl + Alt + N' in the properties of the Flip 3d shortcut, and programmed my macro key for that same key combination. It worked great, but only for a short period of time. Once it stopped working, the only way I could get it to work again was by rebooting my system. Then it would only work for a short while, and then break again. I've tried this many times while using the actual key strokes as opposed to the macro to no avail. I get the same results either way.
I tried moving the shortcut to this folder C:\Users\username\AppData\Roaming\Microsoft\Windows\Start Menu\_hotkeys, however I am experiencing the same result. It works at first, but then stops working until I reboot, then it works fine again.
Can anybody tell me why the keyboard shortcut only works for a short while? Is there a keyboard shortcut that doesn't break (that isn't being used already)?
Thanks